Remove excess phrase from DNS Services section
Remove excess phrase from DNS Services section

This line was mistaken in [this commit](https://github.com/docker/docker.github.io/commit/9193473df51ba42508d0bbb4d74cb19e7378d99a)
thaJeztah/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,thaJeztah/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io,docker/docker.github.io,docker/docker.github.io,docker/docker.github.io